Mobtisikg-machine



UNITED sTATEs PATENT oEEicE.

HIRAM PLUMB AND SIMON H. PLUMB, OF HONESDALE, PENNSYLVANIA.

MORTISINGMACHINE.

i Specification of Letters Patent No. 11,177, dated June 27, 1854.

To all whom t may concern.' j

Be it known thatv we, HIRAM PLUME and SIMON H. PLUME, of Honesdale, in the county of VVa-yne and State of Pennsylvania,

have invented a new andlmproved Mortising-Machine; and we do hereby declare that the following `is a full, clear, and exact description of the` construction and operation of the same, reference `being had to the anspeciication, in whichi Figure l, is a plan or top view of our improved machine. Fig. 2, is a side elevation of ditto. Fig. 3, is a longitudinal vertical section of ditto, the plane of section being through the center. The screw, chisels, and vibratingbar are not bisected.

Similar lettersof reference indicate corresponding parts in the several figures.

This invention relates to a new and improved mort-ising machine, and consists in the employment or use of two chisels, for cutting the ends of the mortise, and a reciprocating chisel or planer, working horizontally for cutting out the wood between the two end chisels, as the latter are forced gradually into the wood.

To enable others skilled in the art to make and use our invention, we will proceed to describe its construction and operation.

A, represents a metallic frame, constructed in any suitable manner, and within which, a cutter stock, B, works, see Figs. 2 and 3,

` said cutter stock being of rectangular form,

and fitting between ways or guides, (a), (a),

on the sides of the frames. The cutter stock is also hollow, similar to a box, and has arms, (b), at its upper part, with a nut, (c), at their top, through which nut, a screw rod, C, works, see Fig. 3.` The screw rod, C, extends upward through the top j of the frame, A, and has a bevel wheel, D, upon it, see Figs. 1 and `3, into which` a bevel pinion, E, upon a transverse shaft, F, gears, see Fig. 1, said shaft `running in suitable bearings, (ai), (d), on the upper part of the ame, A. f

G, G, Figs. 2 and 3, are two chisels which are secured by clamps, H, H, in` t-he cutter stock, B, said clamps being constructed in any proper manner, and fitted within ob-` long slots, (e), in the sides of the cutter stock, so as to allow the chisels, G, G, to be adjusted nearer together or farther apart, as desired.

I, I, Figs. 2, and 3, are stops attached to Ithe upper part of the cutter stock. The `stops are attached to the cutter st-ock by fmeans of nuts, (f), which work on arms, (g), attached to the stops, said arms passing fthrough an oblong slot, (71,), in the side of the cutter stock, see Fig. 2. 5 ment allows the stops to be adjusted in the cutter rock, similar to the chisels, G, G.

neXed drawings, making a part ofI this g This attach- J, is a rectangular bar, which passes lon `gitudinally through the cut-ter stock, B, as

shown in Figs. 2 and 3.

flower end of a shank, L, said shank being jsecured :by a pivot, to the bar, J, as

shown in Fig. 3. The upper part of the shank L, projects some distance above the (top of thecutter stock, see Figs. 2, and 3.

Two shoulders, (j) are on thesides of` ,the shank, L, immediately below thebar, J, las shown in Fig. 3.

M, Figs. l, and 2, is a crank attached `to one end of the transverse shaft, F; and N, is a connecting rod which is attached to the crank, M, and a curved slotted arm, O,

which is` atone end of a shaft, P, see Figs. l, 2, and 3. At the opposite end ofthe shaft, P,Vthere is a crank, Q, which is attached to a slide, R, which fits within a guide bar, S, attached toone end of the bar, J, see Figs. l, and 2. Upon one end of the shaft, F, there is a crank, `T, by which `the machine is operated."

Operation: The machine is secured upon the piece of timber by means of any proper clamp, and in such a position as tocause the mortise to` be cut in the desired place. Motion is then given the crank, T, which causesv the shaft, F, to rotate, and the bevel pinion, E, gearing into the bevel wheel, D, causes the screw rod, C, to rot-ate, which, in consequence, forces downward the cutter stock, B, and the chisels, G, G, gradually penetrate the wood, and cut the ends of the mortise, while the crank, M, connecting rod,

N, slotted arm, O, and crank, Q, give a reciprocating motion to the bar, J,-the slide, R, working in the guide, S. The chisel oru planer, K, consequently has a horizontal re ciprocating motion given it, as its shank, L, is attached to theibar, J, and the wood between the two chisels, G, G, is cut or planed out in a smooth and even manner.

By having the shoulders, (j), (j), on the shank, L, some little distance below the bar,

y tinctly shown. The chisel or planer, K, it

will be understood cuts while going in either direction, and the opposite inclination is given said chisel, K, when at the end of its stroke by the stops, I, I, which act against l `construction or arrangement of the parts the upper part of the shank, L. The planer orchisel, K, descends with the same speed as the chisels, G, G, as the bar, J, passes through the cutter stock, and consequently, l

always has the same relative position to the cutters, G, G.

The edges of the Achisels, G, G, should be a trifle below the cutting edge of the chisel or planer, K, invorder to insure the clean cutting of the ends of the mortise. The -length of t-he vibration of t-he chisel or planer, K, is regulated by securing the connecting rod, N, higher up, or lowerdown on the arm, O.

Different sized chisels may be employed according to the width of mortise desired,

and the mortise may be made of the required length, by adjusting the chisels, G, G, ac-

cordingly, in the cutter stock.

When the mortise is cut, the connecting rod, N, may be detached from the crank, M, and a reverse motion given the crank, T, in order to elevate the cutter stock, B.

By the above machine, large mortises may.

be saved by its use, especially in large work.

IVe do not confine ourselves to the precise lent manner.

HIRAM PLUMB. SIMON H. PLUMB. Witnesses:

E. PATMER,

B. W. WATTS. 

